[bpmcgee]

I went back and carefully resoldered those joints again and it began working!

Thanks very much for your help! Here’s the packet I’m getting in TTN:

{
  "time": "2019-12-22T15:39:15.777170148Z",
  "frequency": 905.3,
  "modulation": "LORA",
  "data_rate": "SF10BW125",
  "coding_rate": "4/5",
  "gateways": [
    {
      "gtw_id": "foobar1",
      "gtw_trusted": true,
      "timestamp": 2071954556,
      "time": "2019-12-22T15:39:15Z",
      "channel": 7,
      "rssi": -40,
      "snr": 10,
      "rf_chain": 1,
      "latitude": 42.20507,
      "longitude": -89.9862,
      "altitude": 4,
      "location_source": "registry"
    }
  ]
}

[bpmcgee]

My iron doesn’t have a temperature indicator. I had it set at 4.5 out of 5. The solder is 1.6mm lead-free rosin core solder.

I didn’t expect to have to do this fine level of soldering for this project, honestly. Even with a magnifying glass, my eyes are poor enough that I have a hard time seeing the joints. I can try again but I’m frightened of overheating the surface mount joints near them — particularly D6-DI01.

Are there test points that I can use with my multimeter to tell if the joints are good?

[bpmcgee]

Sent to your gmail account.

[bpmcgee]

Sorry, to which code? The gateway? No. To your example? Just to replace the rtc alarm with a delay so that the USB doesn’t disconnect.

B

[bpmcgee]

I will take a picture next time I’m near it.

I am certain the radio worked when it left your shop. I’m worried that I may have either smoked it or I have a bad solder joint. Is there a way for me to test it to see if it’s working?

It’s an 8 channel gateway. I know with my Laird node I had to put it in subband 2 for it to work. I don’t currently have the source to the gateway program, so I can’t tell you right now which particular channels are enabled.

B

[bpmcgee]

D3 is reset, correct? I soldered DI01 and D3.

In the code, the last 3 bytes are as above.

The gateway I’m using is this https://uk.pi-supply.com/products/iot-lora-gateway-hat-for-raspberry-pi?_pos=39&_sid=2299b155b&_ss=r . It’s based on the RAK833 Gateway Concentrator Module, which I believe is multi-channel. I’m inquiring with the writer of the software if they’re in some way restricting it to a single channel.

How can I tell if the radio is on and working correctly?

B

[bpmcgee]

Lim,

I did, thank you. That failure is an ASSERT in lmic\radio.c:

static void startrx (u1_t rxmode) {
    ASSERT( (readReg(RegOpMode) & OPMODE_MASK) == OPMODE_SLEEP );
    if(getSf(LMIC.rps) == FSK) { // FSK modem
        rxfsk(rxmode);
    } else { // LoRa modem
        rxlora(rxmode);
    }
    // the radio will go back to STANDBY mode as soon as the RX is finished
    // or timed out, and the corresponding IRQ will inform us about completion.
}

I’m not an expert, but it seems to be saying the library expected the radio to NOT be asleep but it was.

I soldered the connections on the underside of the board — DI01 and D3, although I’m a ham-fisted half-witted solderer. Is there a way for me to tell if the radio is up and operating?

I put my APPEUI in REVERSED from what is shown in the TTN console.
I put my DEVEUI into the TTN console AS SHOWN in the sketch output.
I put my APPKEY in AS SHOWN in the TTN console.

I reset the board by unplugging it, and the sketch proceeds without the FAILURE assertion, but I still don’t get any events past “EV_JOINING”:

Starting
DEVEUI: 0x00 0x04 0xA3 0x0B 0x00 0xE8 0x6A 0xCC
Battery: 4.29 V
Packet queued
50167: EV_JOINING

[bpmcgee]

Understood, thank you. With the ArduinoLowPower library I was able to get my sketch working.

B

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